The official soundtrack released as a CD version on November 15th, 2000, but is difficult to obtain so many years later. A free download opportunity was available on FunCom's official TLJ website, but is unfortunately no longer there. However, purchases of The Longest Journey game e.g. on GOG.com come with the entire soundtrack as a bonus.

The official album comes with the track "The Longest Journey Suite" (12:05), which is missing from the digital releases. Apart from slightly different arrangements of TLJ motifs, the Suite also incorporates pieces found as separate tracks on the web release. As a result, the CD release (77:10) is slightly longer than the web release (75:54), but has less individual tracks (30 compared to 36).

One track not included on either soundtrack release is the ambient music playing in the foyer of MTI's HQ. It's just 17 seconds long, however the reason that it's not on either soundtrack is that it's probably royalty free music, not composed by Lagim or Linløkken. The home video company Quality Films SA in Mexico has e.g. used the same sample for their 1999 logo animation. From TLJ, the sample can be extracted as a WAV file by using TLJView, following the path The Longest Journey > Vanguard Building > Entrance Hall > entrance hall.